The Distributor in an engine is the component responsible for delivering the spark to the correct cylinder at the correct time. There is a shaft inside of the distributor that rotates, and on the end of this shaft is a part called a rotor

1. Electrical Distributor, What Does it Meant for an Engine?
Ignition Timing is Managed by Distributor
The Distributor in an engine is the component responsible for delivering the spark to the correct cylinder at the correct time. There is a shaft inside of the distributor that rotates, and on the end of this shaft is a part called a rotor.
There is a usually a gear at the lower end of the distributor shaft that meshes with a gear on the camshaft, which keeps the distributor in correct timing in relation to the engine.
Single cylinder engines do not require a distributor, as the spark is delivered directly from components generating a spark from the crankshaft. A distributor is necessary once there is more than one cylinder in an engine.
Some newer vehicles use “direct fire” ignition systems, or “distributor less” ignition systems, but most vehicles on the road still use distributors.
Ignition Process of the Vehicle and Distributor
The ignition coil can be mounted away from the distributor and connected to the distributor cap with a coil wire, or it can be mounted directly on the top of the distributor cap, eliminating the need for a coil wire.
The spark from the coil enters the cap in the center, and as the rotor rotates, the spark is directed to the proper cylinder that needs the spark delivered. As the spark is delivered, the spark plug wire carries the high voltage charge down to the spark plug, where it ignites the air/fuel mixture in a controlled explosion that powers the engine.
Each cylinder receives the spark at the precise time to keep the engine running smoothly.

2. Different Components of the Distributor
There are several other components inside the distributor that all work together to deliver a spark to the needed cylinder. There can be an ignition module, a position sensor, a condenser, points, and several other components.
Some distributors contain these parts while others do not. It depends on the exact design of your particular vehicle. Most distributors also have some type of manual spark advance system, either vacuum or electrically controlled.
To properly diagnose all the parts contained in a distributor require specialized tools and the knowledge to test and install them properly inside the distributor. So what can a consumer do? Often, the best option is to simply replace the complete unit.
If there is excessive wear in the housing or shaft, this is often the only option available. As stated earlier, there are some specialized tools needed to rebuild a distributor.
You also need to install the parts with precise spacing and alignment. If parts are not installed with the proper gaps, there will be no spark delivered. Some new distributors can also generate extremely high voltage when operating, so extreme caution is needed.

3. Replacement Information for Distributor
Companies such as theautopartsshop.com sell remanufactured distributors from companies such as ARC and A1 Cardone starting as low as $30.00.
The average price range is between $75.00 and $150.00. There are also new and remanufactured distributors available from Dorman, Bosch, Motorcraft and AC/Delco. These OEM and OES distributors can range from $100.00 to $250.00 or more.
If you decide to replace your distributor as a complete unit, it is a fairly simple procedure. You will need a basic set of wrenches or sockets, a selection of screw drivers, and some time.
With the ignition off, you need to remove the distributor cap. If necessary to remove the ignition wires from the cap, mark the position of each wire on the cap itself as they must be replaced in the proper location.
Mark the position of the rotor using a dab of paint or permanent marker, as well as the position of the distributor itself. Next, remove the bolt holding the distributor retainer. This is normally a clamp below the distributor housing.
After you remove the bolt and clamp, the distributor will spin easily and you can gently lift it out. Notice the rotor will rotate as you remove the distributor. It will make it easier to reinstall if you notice where the rotor is positioned when the distributor is free.
IMPORTANT: AFTER THE DISTRIBUTOR IS REMOVED, DO NOT CRANK THE ENGINE!
If you do, it will be necessary to position the engine at what is called “top dead center” a procedure which involves removing the spark plugs and rocker cover(s). Move the seal or gasket from the old distributor to the replacement distributor and reinstall.
If you noted the position when removed, as you reinstall the part the alignment will be easy. The rotor should be in the exact position as the old setup. Align the housing, replace the hold down clamp, cap and wires if they were removed and the Engine should start.
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